CN201541120U - Load switch protective device - Google Patents
Load switch protective device Download PDFInfo
- Publication number
- CN201541120U CN201541120U CN2009201345418U CN200920134541U CN201541120U CN 201541120 U CN201541120 U CN 201541120U CN 2009201345418 U CN2009201345418 U CN 2009201345418U CN 200920134541 U CN200920134541 U CN 200920134541U CN 201541120 U CN201541120 U CN 201541120U
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- China
- Prior art keywords
- load switch
- protective device
- module
- primary equipment
- controller unit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a load switch protective device comprising a fusing module, a load switch module which is connected in series with the fusing module, and a control module that is connected with the load switch module, wherein the control module controls the load switch module to work, according to current signals on power grid primary equipment; and the control module comprises a collecting unit and a controller unit, wherein the collecting unit is used for collecting the current signals of the power grid primary equipment, conducting analog-to-digital conversion and outputting conversion signals, while the controller unit treats the conversion signals and outputting control signals. The control module is used for collecting load current signals, treating the current signals and outputting control signals according to treatment results; and the load switch is controlled by the control signals to work, the waste caused by the fusing of a fuse can be reduced, thus lowering the running cost of the power grid primary equipment.
Description
Technical field
The utility model relates to tranformer protection circuit engineering field, particularly a kind of on-load switch protective device.
Background technology
Because transformer is subjected to the influence of external voltage in the course of work, transformer is burnt because of overload or short circuit, so need protective circuit transformer is protected it when overload occurring.
Existing transformer adopting fuse is protected transformer, by selecting suitable fuse for use, can transformer generation overload or during short circuit, and can quick fuse, disconnect overload or short-circuit loop, thereby can protect transformer.Though fuse can be protected the overload or the short circuit of transformer, when fuse is selected bigger blowout current for use, when less overload occurring, can not protect transformer for transformer; This moment, overladen electric current may produce harm to transformer.When selecting the fuse of less blowout current for use, overload this moment electric current may be the normal overload that transformer can bear, and does not need to carry out fuse protection, therefore causes the waste of fuse, thereby increases transformer operating cost.
The utility model content
The technical problem that the utility model mainly solves provides a kind of on-load switch protective device, can provide protection to the electrical network primary equipment, reduces electrical network primary equipment operating cost simultaneously again.
In order to address the above problem; the utility model on-load switch protective device; this on-load switch protective device comprises the fusing module that the electrical network primary equipment is protected; described on-load switch protective device also comprises on-load switch module that is connected in series with described fusing module and the control module that is electrically connected with described on-load switch module and electrical network primary equipment respectively; described control module is according to the work of the control of the current signal on described electrical network primary equipment on-load switch module, and wherein said control module comprises collecting unit that is electrically connected with described electrical network primary equipment and the controller unit that is electrically connected with described collecting unit and on-load switch module.
Preferably, described control module also comprises memory cell and input unit, and wherein, described memory cell is connected with described controller unit, is used to store Control Software and parameter; Described input unit is connected with described controller unit, is used for input inquiry or the constant value command of adjusting, and the operating current of described on-load switch protective device is made amendment.
Preferably, described control module also comprises the Tip element that is connected with described control unit, and this Tip element is pointed out the state of described protective device according to the control signal of described controller unit output.
Preferably, described memory cell comprises RAM, E
2PROM or FLASH flash memory, wherein, described RAM, E
2PROM or FLASH flash memory are connected with described controller unit respectively.
Preferably, described controller unit comprises CPU or single-chip microcomputer.
Preferably, described Tip element comprises LCD or acoustic luminous device.
Preferably, described electrical network primary equipment comprises transformer.
The utility model provides a kind of on-load switch protective device; comprise on-load switch module, fusing module and control module that overload is protected; gather the load current signal by control module; and this current signal handled; according to result output control signal; by the work of described control signal control on-load switch; realization is to the protection of electrical network primary equipment; when hour can starting the on-load switch module, load current protects; reduce the waste that the work of fusing module causes, thereby reduce the operating cost of electrical network primary equipment.
Description of drawings
Fig. 1 is an embodiment theory diagram of the utility model on-load switch protective device;
Fig. 2 is a theory diagram of the utility model embodiment control module.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
The on-load switch protective device embodiment of the utility model embodiment; gather the load current signal by control module; and this current signal handled; according to result output control signal; by the work of described control signal control on-load switch, realize protection to the electrical network primary equipment, can reduce because of load current when too small; the waste that the work of fusing module causes reduces electrical network primary equipment operating cost purpose thereby reach.
As shown in Figure 1, the utility model on-load switch protective device proposes an embodiment.
Described on-load switch protective device comprises the fusing module 3 that electrical network primary equipment 4 is protected; described on-load switch protective device also comprises on-load switch module 1 that is connected in series with described fusing module 3 and the control module 2 that is electrically connected with described on-load switch module 1 and electrical network primary equipment 4 respectively, and described control module 2 is according to 1 work of the control of the current signal on the described electrical network primary equipment 4 on-load switch module.Wherein, described control module 2 comprises: collecting unit 21 that is electrically connected with described electrical network primary equipment 4 and the controller unit 22 that is electrically connected with described collecting unit 21 and on-load switch module 1.Described collecting unit 21 is used to gather the current signal of described electrical network primary equipment, and carries out analog-to-digital conversion, the output switching signal; The switching signal of described collecting units 21 outputs of 22 pairs of described controller units is handled, and the output control signal is controlled described on-load switch module 1 and opened and closed or cut-off.
Described on-load switch module 1 and fusing module 3 are protected overload on the electrical network primary equipment 4 and short circuit respectively.Described fusing module 3 can be selected existing fuse for use, and the specification of fuse can be determined as required; The on-load switch module 1 of opening can be selected existing on-load switch for use, and electrical network primary equipment 4 is opened and closed load current or cut-offs the overload electric current.Described electrical network primary equipment 4 can be a transformer.Described controller unit 22 can be selected existing C PU (Central ProcessUnit, CPU) or single-chip microcomputer for use.
As shown in Figure 2, described control module 2 can also comprise memory cell 23, input unit 24 and Tip element 25 and power subsystem 26.Wherein, described memory cell 23 is connected with described controller unit 22, with storage Control Software and parameter; This memory cell 23 can comprise RAM, E
2PROM or FLASH flash memory, described RAM, E
2PROM or FLASH flash memory are connected with described controller unit 22 respectively.Described input unit 24 is connected with described controller unit 22, is used for input instruction, and the operating current of described on-load switch protective device is made amendment; This instruction can be to inquiry, the definite value etc. of adjusting.Described input unit 24 can be keyboard or other entering apparatus.Described Tip element 25 can be pointed out the state of described protective device according to the control signal of described controller unit 22 outputs, and described Tip element 25 can pass through LCD or acoustic luminous device.Described power subsystem 26 is respectively described controller unit 22 and collecting unit 21 provides power supply.Described power subsystem 26 can be exported three groups of direct voltages with alternating current-direct current 220V or 110V voltage transitions, promptly+3.3V+5V ,+12V.Wherein+3.3V provides working power for described controller unit 22; + 5V is described amplifying circuit power supply source; + 12V is the control relay power supply.
Specifically, when the electric current of gathering during, promptly described electrical network primary equipment 4 overloads, start earlier by described on-load switch module 1 and to carry out moving from protection greater than the parameter that is arranged on described memory cell 23 in.By described controller unit 22 output control signals; controlling described on-load switch module 1 cut-offs; can protect described electrical network primary equipment 4; make the fusing module 3 that is connected in series with on-load switch module 1 not work; the module that promptly fuses 3 can not fuse; thereby reduce the waste of fusing module 3, reduced the operating cost of electrical network primary equipment 4.
Described controller unit 22 can also be accepted through pulse signal and remote control input signal and input unit 24 input instructions, and wherein said input unit 24 can be a keyboard, and input instruction can comprise inquiry, the definite value etc. of adjusting.Wherein, described pulse signal can pass through isolation processing, for example passes through the photoelectricity isolation processing, also can be other isolation processing.When the current signal on the described electrical network primary equipment 4 during greater than the parameter that is arranged in the described memory cell 23, described controller unit 22 output control signals are controlled described on-load switch module 1 and are opened and closed or cut-off.Simultaneously, described control module 22 can also be sent corresponding position, status signal.Can also store parameters such as the current information of all collections, the process of adjusting, query script, accident, time in the described memory cell 23, and can show by LCD.Also can be by being stored in software setting current break parameter in the described memory cell 23, overload start-up parameter etc.
In the present embodiment, described collecting unit 21 by 12 analog to digital conversion circuits of high reliability change fast, characteristics such as sampling deviation is little, power consumption is little, stability is better.Therefore the sampling circuit of on-load switch protective device described in the utility model does not need to adjust element and on-the-spot the adjustment, has higher reliability.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (7)
1. the on-load switch protective device comprises the fusing module that the electrical network primary equipment is protected, and it is characterized in that:
Described on-load switch protective device also comprises on-load switch module that is connected in series with described fusing module and the control module that is electrically connected with described on-load switch module and electrical network primary equipment respectively; described control module is according to the work of the control of the current signal on described electrical network primary equipment on-load switch module; wherein, described control module comprises collecting unit that is electrically connected with described electrical network primary equipment and the controller unit that is electrically connected with described collecting unit and on-load switch module.
2. on-load switch protective device according to claim 1 is characterized in that:
Described control module also comprises memory cell and input unit, and wherein, described memory cell is connected with described controller unit, is used to store Control Software and parameter; Described input unit is connected with described controller unit, is used for input inquiry or the constant value command of adjusting, and the operating current of described on-load switch protective device is made amendment.
3. on-load switch protective device according to claim 2 is characterized in that:
Described control module also comprises the Tip element that is connected with described control unit, and this Tip element is pointed out the state of described protective device according to the control signal of described controller unit output.
4. on-load switch protective device according to claim 2 is characterized in that:
Described memory cell comprises RAM, E
2PROM or FLASH flash memory, wherein, described RAM, E
2PROM or FLASH flash memory are connected with described controller unit respectively.
5. according to the described on-load switch protective device of each claim of claim 1 to 4, it is characterized in that:
Described controller unit comprises CPU or single-chip microcomputer.
6. on-load switch protective device according to claim 3 is characterized in that:
Described Tip element comprises LCD or acoustic luminous device.
7. on-load switch protective device according to claim 5 is characterized in that:
Described electrical network primary equipment comprises transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201345418U CN201541120U (en) | 2009-08-06 | 2009-08-06 | Load switch protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201345418U CN201541120U (en) | 2009-08-06 | 2009-08-06 | Load switch protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541120U true CN201541120U (en) | 2010-08-04 |
Family
ID=42592577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201345418U Expired - Fee Related CN201541120U (en) | 2009-08-06 | 2009-08-06 | Load switch protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201541120U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471931A (en) * | 2021-06-28 | 2021-10-01 | 三一汽车制造有限公司 | Power supply loop protection device and method |
-
2009
- 2009-08-06 CN CN2009201345418U patent/CN201541120U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471931A (en) * | 2021-06-28 | 2021-10-01 | 三一汽车制造有限公司 | Power supply loop protection device and method |
| CN113471931B (en) * | 2021-06-28 | 2023-12-22 | 三一汽车制造有限公司 | Power supply loop protection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20150806 |
|
| EXPY | Termination of patent right or utility model |